diff --git a/include/utils/VectorImpl.h b/include/utils/VectorImpl.h
index cab95bef8d1..88c3a05d0bf 100644
--- a/include/utils/VectorImpl.h
+++ b/include/utils/VectorImpl.h
@@ -106,7 +106,7 @@ class VectorImpl
     virtual void            do_move_forward(void* dest, const void* from, size_t num) const = 0;
     virtual void            do_move_backward(void* dest, const void* from, size_t num) const = 0;
 
-#if NEEDS_VECTORIMPL_SYMBOLS
+#ifdef NEEDS_VECTORIMPL_SYMBOLS
     // take care of FBC...
     virtual void            reservedVectorImpl1();
     virtual void            reservedVectorImpl2();
@@ -168,7 +168,7 @@ class SortedVectorImpl : public VectorImpl
 protected:
     virtual int             do_compare(const void* lhs, const void* rhs) const = 0;
 
-#if NEEDS_VECTORIMPL_SYMBOLS
+#ifdef NEEDS_VECTORIMPL_SYMBOLS
     // take care of FBC...
     virtual void            reservedSortedVectorImpl1();
     virtual void            reservedSortedVectorImpl2();
diff --git a/libutils/VectorImpl.cpp b/libutils/VectorImpl.cpp
index e35766c9098..f5141a65f48 100644
--- a/libutils/VectorImpl.cpp
+++ b/libutils/VectorImpl.cpp
@@ -518,7 +518,7 @@ void VectorImpl::_do_move_backward(void* dest, const void* from, size_t num) con
     do_move_backward(dest, from, num);
 }
 
-#if NEEDS_VECTORIMPL_SYMBOLS
+#ifdef NEEDS_VECTORIMPL_SYMBOLS
 void VectorImpl::reservedVectorImpl1() { }
 void VectorImpl::reservedVectorImpl2() { }
 void VectorImpl::reservedVectorImpl3() { }
@@ -644,7 +644,7 @@ ssize_t SortedVectorImpl::remove(const void* item)
     return i;
 }
 
-#if NEEDS_VECTORIMPL_SYMBOLS
+#ifdef NEEDS_VECTORIMPL_SYMBOLS
 void SortedVectorImpl::reservedSortedVectorImpl1() { };
 void SortedVectorImpl::reservedSortedVectorImpl2() { };
 void SortedVectorImpl::reservedSortedVectorImpl3() { };